late 14c., capitayn, "a leader, chief, one who stands at the head of others," from Old French capitaine "captain, leader," from Late Latin capitaneus "chief," noun use of adjective capitaneus "prominent, chief," from Latin caput (genitive capitis) "head" (see capitulum).

Military sense of "officer who commands a company" (rank between major and lieutenant) is from 1560s; naval sense of "officer who commands a man-of-war" is from 1550s, extended to "master or commander of a vessel of any kind" by 1704. Sporting sense is first recorded 1823.

(1.) Heb. sar (1 Sam. 22:2; 2 Sam. 23:19). Rendered "chief," Gen. 40:2; 41:9; rendered also "prince," Dan. 1:7; "ruler," Judg. 9:30; "governor,' 1 Kings 22:26. This same Hebrew word denotes a military captain (Ex. 18:21; 2 Kings 1:9; Deut. 1:15; 1 Sam. 18:13, etc.), the "captain of the body-guard" (Gen. 37:36; 39:1; 41:10; Jer. 40:1), or, as the word may be rendered, "chief of the executioners" (marg.). The officers of the king's body-guard frequently acted as executioners. Nebuzar-adan (Jer. 39:13) and Arioch (Dan. 2:14) held this office in Babylon. The "captain of the guard" mentioned in Acts 28:16 was the Praetorian prefect, the commander of the Praetorian troops. (2.) Another word (Heb. katsin) so translated denotes sometimes a military (Josh. 10:24; Judg. 11:6, 11; Isa. 22:3 "rulers;" Dan. 11:18) and sometimes a civil command, a judge, magistrate, Arab. _kady_, (Isa. 1:10; 3:6; Micah 3:1, 9). (3.) It is also the rendering of a Hebrew word (shalish) meaning "a third man," or "one of three." The LXX. render in plural by _tristatai_; i.e., "soldiers fighting from chariots," so called because each war-chariot contained three men, one of whom acted as charioteer while the other two fought (Ex. 14:7; 15:4; 1 Kings 9:22; comp. 2 Kings 9:25). This word is used also to denote the king's body-guard (2 Kings 10:25; 1 Chr. 12:18; 2 Chr. 11:11) or aides-de-camp. (4.) The "captain of the temple" mentioned in Acts 4:1 and 5:24 was not a military officer, but superintendent of the guard of priests and Levites who kept watch in the temple by night. (Comp. "the ruler of the house of God," 1 Chr. 9:11; 2 Chr. 31:13; Neh. 11:11.) (5.) The Captain of our salvation is a name given to our Lord (Heb. 2:10), because he is the author and source of our salvation, the head of his people, whom he is conducting to glory. The "captain of the Lord's host" (Josh. 5:14, 15) is the name given to that mysterious person who manifested himself to Abraham (Gen. 12:7), and to Moses in the bush (Ex. 3:2, 6, etc.) the Angel of the covenant. (See ANGEL.)